Historical Figures in Mathematics

Which mathematician is known for introducing the plus sign (+)?

Which mathematician is known for their theorem on the diagonals of a cyclical quadrilateral?

Who is credited with introducing the radical sign in mathematics?

Which mathematician is known for their work in analytic geometry and the modern symbols in radical with vinculum?

Who is known for their Fibonacci sequence, a famous number sequence?

Which mathematician is known for their contributions to the field of Algebra, especially the law of exponents?

Which mathematician is known for introducing the Leibniz rule and the modern symbol for integration?

Which mathematician is known for his special rule for limits that states the limit of $f(x)/g(x)$ as $x$ approaches a certain value is equal to the quotient of the value substituted on the partial derivative of $f(x)$ and $g(x)$ provided that $f(x)/g(x)$ is indeterminate?

Which mathematician is known for introducing the Fano plane, a projective plane having 7 points and 7 lines?

Which mathematician is known for his Euler's number (e) and modern symbols for differentiation?

Which mathematician is known for devising the three planetary laws and concluding that the orbit of the planets are elliptical?

Which mathematician is known for his Hilbert's problem that composes of difficult math problems that cannot be solved?

Who is known as the Father of Algebra?

Which mathematician proved that the triangle inscribed in a semicircle is a right triangle?

Who introduced numerology and the concept of horoscope according to numbers?

Which mathematician attempted to find the value of pi?

Who devised the trigonometric tables using the chords of the circle?

Which mathematician is famous for calculating Earth's circumference through shadows?